Two-color-printing machine



(No Model.)

2 Sheets-Sheet 1. J. T. HAWKINS. TWO COLOR PRINTING MACHINE.

No. 445,017. Patented Jan. 20,1891.-

(No Model.) 2 sheets-sheet 2.

J. T. HAWKINS. TWO COLOR PRINTING MACHINE,

No. 445,017. Patented Jan. 20, 1891.

TES

PATENT OFFICE.

JOHN T. IIAIVKINS, OF TAUN"ON, AIASSACIIUSETTS.

TWO-COLOR-PRINTING MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 445,017, dated January 20, 1891.

Application filed February 13, 1890 Serial N0. 340,253- (No model.)

To all whom it may concern:

Be it known that 1, JOHN THOMAS HAW- KINS, of Taunton, in the county of Bristol and State of Massachusetts, have invented new and useful Improvements in Two-Color-Printing Machines, which invention is fully set forth and illustrated in the following specification and accompanying drawings.

The object of this invention is to provide a machine which shall print separate colors upon one side of a sheet of paper, by means of two forms attached to a single reciprocatin 59; bed and acorresponding numberof impression cylinders, in passing the sheet once through the machine, and to effect this without contact of the printed sheet with any part of the mechanism in the transfer from one impression-cylinder to the other or in the process of delivery.

The invention will first be described in detail, and then particularly set forth in the claims.

In the accompanying drawings, Figurel is a side elevation of so much of a machine for printing in two colors as is necessary to the complete illustration of this invention, sun dry parts being omitted, such as the mechanism for reciprocating the form-bed, for operating the grippers, and a portion of the inking apparatus, as these parts may be constructed in a variety of ways well known in the art, and not necessary, therefore, to a full illustration of this invention. Figs. 2, 3, and e are diagrams on a reduced scale, showing the relative positions of the several parts for three different positions of the sheet in pass ing through the machine.

In said figures the several. parts are imlicated by referencenumbers, as follows? The number 1 indicates the main frames, and the number 2 indicates the form-bed carrying two forms '3 and 1-, one for each color. The forms 3 and 4; are provided, respectively, with inking-rollers 5 and 6, the ink-fountains and other parts of the inking apparatus being omitted.

The number 7 indicates the impression-cyl' inder for form 3, and S the impression-cylinder for form 4, both cylinders making two revolutions to each impression and being continuously revolving. From the feed-board 9 the sheets are fed to the impression-cylinder '7.

The impression-cylinders 7 and 8 are provided with the usual grippers 10 and 11, opcrated to take and release the sheets at the proper time by any of the well-known methods. A transfer-cylinder 12, of one-half the diameter of the impression-cylinders 7 and S and making two revolutions to each revolution of an impression-cylinder, is provided with grippers 13. The shafts 17 and 1-1 are journaled in the frames 1, having secured to them a series of arms 26, carrying on their free ends gripper-rests 27. .Iournaled in the arms 26 are rock-shafts 16, upon which are secured the grippers 60 and 61. Shafts l4: and 17, arms 26, with the gripper-rests 27, and grippers 60 or 01 constitute rotating gripper-frames. The arms 26 are of such radius as to cause the grippers 60 and (31 to describe circles of the same diameter as those of the transfer-cylinder1i, as shown in dotted lines, and by means of spur-gears on the axes of the impression-eylinders 7 and 8, transfercylinder 12, and shaft-s 17 and let, as indi eatcd by the several circles, the whole forming a train from impression-cylinder 7 to impression-cylinder 8, the several sets of grippers 10, 11, 13, 60, and G1 are timed to meet each other and coact in transferring the sheet from impression-cylinder 7 to impression-cylinder 8, the impressioncylinders 7 and 8 being placed far enough apart to permit their respective gears to pass one another.

The mechanism for reciprocating the foriubed is omitted as not necessary to illustrate this invention, and may be any well-known device for that purpose.

The impression-cylinders T and S are caused to rise and fall to clear and make contact with their respective forms by the followingdescribed mechanism: A shaft 18, journaled in the frames 1, is actuated by a suitable train of gearing, as indicated by the circles 19 20,21 22 23 23" in such proportion as to make one revolution to each sheet printed or one revolution to each two revolutions of the impression-eyliuders 7 and The journals of the impression-cylinders 7 and 8 run in eccentric-boxes 28 and 29, the eccentricity being shown in dotted lines. The boxes 28 and 29 have arms 30 and 81 secured to them, the boxes and arms being the same for both sides of the machine. .lournaled in the frames are two rock-shafts 32 and On rock-shaft 32, inside the frames, is secured a lever 34, carrying on its free end a roller 35. On the same shaft 33, outside the frames is secured a lever 36. .hlounted loosely on rock-shaft is a lever 37, carrying on its free end a roller 40. Secured to rock-shaft 323, inside the frames 1, is a lever 38 and a similar lever 39 outside of frames 1. Levers 38 and 37 are connected by a link 41. Fulcrumed on the inside of the frame are two levers 42 43, respectively, carrying rollers 44 and 45. To the free ends of levers 42 and 43 are connected hook-bars 46 and 47, whose hooked ends engage the rollers 35 and 40. Connecting the free ends of levers 31 and 39 for one impression-cylinder and .30 and 36 for the other impression-cylinder are links or connecting-rods 48 and 49. The eccentric-boxes 28 29, levers 30 31, links 48 49, and levers 36 39 are the same on both sides of the machine. A double box-cam 50 is secured to shaft 18, the lever 42 being on one and the lever 43 on the other side of it, and the roller 44 engages the cam-groove shown in full lines on the inner side of cam 50, and the roller 45 the groove shown in dotted lines on the far side, as seen in Fig. 1. A rock-shaft 51 is journaled in the frames 1. Outside and inside, respectively of saidframes g re secured to said rock-shaft the levers 52 0. side of it rollers 54, one of which engages the under side of the free end of the hook-bar46 and the other the under side of the free end of the hook-bar 47. On a stud 55, secured in the frames is fulcrumed a bell-crank lever 56, to one arm of which is articulated a link 74, articulating with the free end of lever 52, and to the other arm a vertical sliding rod 58, provided with atread 57 upon its upper end.

By means of the mechanism just described the impression cylinders 7 and 8 are automatically lifted to clear the forms on the noncylinder 8 and delivers it on a receiving board 75.

It is evident that the transfer-cylinder 12 may be either a continuous cylinder or may consist of a series of narrow-faced pulleys, these pulleys being in every way an equivalent for such cylinder, as is Well known in the art; and all reference herein to transfer-cyL The freeend of lever 53 carries on each inder 12 is to be understood to cover either of these forms.

The operation of the parts is follows: A sheet, being fed from the feed-board 9 to the first impression cylinder 7, is carried around and printed on the first form 3. After a complete revolution of impression-cylinder 7 grippers 10 release and grippers (30 take the sheet and convey the same to the grippers 13 of transfer-cylinder 12, with theprinted side outward on that cylinder. Grippers 13 convey it to grippers 61 and these lastto grippers 11 of the second impression-cylinder 8, when the sheetis carried around and printed upon the second form 4, and during the suc eeedin gnon-printing revolution of impressioncylinder 8 the sheet is delivered with. the blank side in contact therewith upon the fly 59, which by any of the well-known means turns it over upon the receiving-board 75.

In the diagrams, Figs. 2 to 4, inclusive, the passage of the sheet is traced and the several positions of the parts are shown as follows: In Fig. 2 the sheet 62 has been taken from the feed-board 9 by the grippers 10 of impression-cylinder '7 and carried down ready to commence printing on form 3, and a ,previous sheet 63 has been taken by the grippers 11 of impression-cylinderS and iscorrespondingly in position to meet theform 4, the formbed 2 being at its extreme left-hand position and about to move on its printing-stroke. In Fig. 3 sheet 62 has been printed on form 3 and sheet 63 on form 4, sheet 62 has been transferred by the grippers to grippers 13 of transfer-cylinder 12, sheet 63 is about to be delivered upon the fly 59, and the form-bed 2 has arrived at its extreme right-hand position ready to commence its non -printing stroke. In Fig. 4 sheet 63 has passed down the fly 59, been laid thereby on the receivingboard 7 5, sheet 62 has been taken from grip pers 13 by grippers 61 and by them transferred to impression-cylinder 8, and impression-cylinder 7 has taken a new sheet 64, and sheets 62 and 64 are in position to be printed on the next printing-stroke of the forms.

It will be seen that in this construction the sheets are transferred from impression-cylinder 7 to transfer-cylinder 12 and from transfer-cylinder 12 to impression-cylinder 8, and that the printed side of the sheet will thus be brought into contact with nothing, that in passing over transfer-cylinder 12 the blank side of the sheet is in contact therewith, and that its printed side will be uppermost in passing down the fly 59, and that therefore the printed side will be kept from contact with any part of the transfer or delivery mechanism during such transfer or delivery.

It is obvious that for the transfer-cylinder 12 may be substituted gripper-arms, like v26, or that transfer-cylinders, like 12, may be substituted for gripper-arms 26, as is shown in my application, Serial No. 340,254, (Case 0,) filed herewith. Said transfer-cylinder and IIO said gripper-arms perform similar functions in a similar manner, and are herein regarded as equivalent mechanical devices.

Having thus fully described my said improvements as of my invention, I claim- 1. In a tWo-color-printing machine, in combination with two continuously revolving impression-cylinders, as 7 and 8, each making two revolutions to one impression and each carrying grippers, as 10 and 11, two sets of rotating gripper-arms, as 26, and an intervening transfer-cylinder, as 12, each carrying grippers, as 60, 13, and 61, said impression-cylinders, rotating gripper-arms, and transfer-cylinder being geared together in train and adjusted so that their respective grippers coact for the transfer of a sheet from one impression-cylinder to said transfer-cylinder and thence to the second impression-cylinder without contact of the printed side of the sheet with any part of the mechanism, substantially as set forth.

2. In a tWo-color-printin g machine the corn hination of a reciprocating bed, as 2, carrying two forms, as 3 and 4, a corresponding numher of conti nnonsly-revolving impression-cylinders, as T and 8, each making two revolutions to each impression and carrying grippers, as 10 and 11, rotating gripper-arms, as 26, carrying grippers, as (30 and 61, coacting with the grippers of said impression-cylinders, an intervening transfer-cylinder, as 12, carrying grippers, as 13, coacting with the grippers of said rotating gripper-frames, a feed-hoard, as 9, leading to the first impression-cylinder, and a fly, as 59, to take the sheet from the second impression-cylinder, whereby sheets fed to the first impressioncylinder are printed on one form, transferred to said transfer-cylinder, thence transferred to the second impression-cylinder and printed on the second form, and then delivered upon a fly-table or other receptacle Without contact of the printed side of the sheet with either transfer or delivery mechanism, substantially as set forth.

JOHN l. HAXVKINS. lVitnesses:

THEO. II. FRIEND, FRANCIS P. REILLY. 

